EP1987472B1 - Biodetektor mit kontaktlosem betrieb - Google Patents

Biodetektor mit kontaktlosem betrieb Download PDF

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Publication number
EP1987472B1
EP1987472B1 EP07731018A EP07731018A EP1987472B1 EP 1987472 B1 EP1987472 B1 EP 1987472B1 EP 07731018 A EP07731018 A EP 07731018A EP 07731018 A EP07731018 A EP 07731018A EP 1987472 B1 EP1987472 B1 EP 1987472B1
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Prior art keywords
finger
hand
plane
image
biodetector
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French (fr)
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EP1987472A1 (de
Inventor
François Dufresne de Virel
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Idemia Identity and Security France SAS
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Sagem Securite SA
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1312—Sensors therefor direct reading, e.g. contactless acquisition

Definitions

  • the present invention relates to a biosensor operating without contact, or remotely, that is to say without it being necessary to apply the body part which is detected against a bearing surface.
  • Biosensors exist, which proceed by recognition of a palmar fingerprint of a user, by recognition of an outline of his hand, a geometry of the fingers (length of the phalanges, position of the joints or folds of the fingers, etc.) , by recognizing a fingerprint or by combining some of these methods (see, for example, DE 100 46 406 ).
  • an image of the inner face of the hand or finger is formed by an image pickup device, then the image is analyzed by an image processing system and biodetection data is extracted. These biodetection data are then compared to recognition and / or identification data stored in a database, which may be local or remote.
  • the image formed must have sufficient resolution to allow recognition and / or identification of the user.
  • a minimum area of the order of 15x22.5 cm 2 shall be imaged with a minimum resolution of the order of 0.1 mm or less, to obtain a complete image of the hand with the fingers slightly apart, while having sufficient resolution for fingerprints.
  • a magnification of approximately 1 / 6.25 is required and the sensor must have between 6 and 12 million pixels. The size of a pixel is then approximately 8.5 ⁇ m and the resolution obtained is 50 ⁇ m.
  • the face of the hand or the finger whose image is formed must be located precisely in a given image acquisition plane, so that the image formed is focused in the best possible way on the detector (see, for example, EP 1 612 714 ).
  • the depth of field of the biodetection imaging device depends on the pixel size of the detector, the magnification between the plane of the hand or the finger and the image plane at the detector, as well as the opening of the image forming device. For a given magnification, the larger the aperture of the imaging device, the lower the depth of field. The device is then all the more sensitive and reduced illumination of the hand or finger (s) is sufficient.
  • a bearing surface such as a glass plate or a prism
  • a support plate is generally transparent, in particular to allow to illuminate the face of the hand or the finger whose image is formed, but also to allow proper operation of the sensor and possibly to incorporate in this plate fraud detection devices.
  • the conditions for capturing a biodetection image are then directly met when the user applies his hand or finger to the support surface.
  • a bearing surface is dirty during use, including skin fatty deposits that are left by each user. Reluctance on the part of the user results, for the use of such biosensors.
  • Cultural behaviors also exist, according to which the user seeks to avoid skin contact with an external surface.
  • biodetection image capture device would autofocus according to the distance between the goal and the hand or the finger.
  • automatic focusing systems exist, which are for example based on an infrared distance measurement. But they are complex, require that the purpose of the imaging device of biodetection has moving parts, and is therefore expensive.
  • autofocus devices do not encourage the user to present his hand by unfolding it or by extending his fingers, or to present it parallel to the image capture plane. For these reasons, the image that is formed may be of poor quality, or of insufficient quality to allow recognition or identification of the user.
  • An object of the present invention is therefore to provide a biosensor which does not have the disadvantages mentioned above.
  • the invention proposes a biodetector which makes it possible to record the image of a hand or at least one finger of a user, for example for a function of recognition or identification of the latter.
  • the biosensor comprises a biosensing image forming device, which is adapted to record the image when a first face of the hand or finger is placed substantially in a portion of a determined image acquisition plane. This portion of the image capture plane is located in a placement volume of the hand or the finger that has no contact surface.
  • the biosensor further comprises a projection device of two components of a visual sign, which is adapted so that this sign is reconstructed from the two components in a registration plane substantially parallel to the image acquisition plane. This registration plane is located, when the biodetection image is formed, at a distance from the image acquisition plane such that the reconstituted sign is visible on a second face of the hand or the finger opposite to the first face.
  • the visual sign can be projected both on the back of the hand or on the top of one or more fingers, in particular to encourage the user to unfold his hand.
  • a biosensor according to the invention is therefore of the contactless type, since the user must place his hand, or his finger, in a volume devoid of a contact surface, at the level of the image acquisition plane.
  • Such a biodetector does not arouse reluctance in a user who fear, consciously or unconsciously, cutaneous contact with an external surface.
  • the appropriate hand or finger presentation distance from the biodetection image forming device is indicated by a visible sign which is projected onto the hand or the s) finger (s).
  • Two components of this sign are projected simultaneously on the back of the hand or finger (s). These components constructively combine only in a plane that is located at a distance from the image acquisition plane corresponding to the thickness of the hand or the finger (s). In this way, the user moves forward or backward in front of the biodetection imaging device until he sees the reconstructed sign on the back of his hand or finger (s). .
  • Such a biosensor thus has an intuitive mode of use, which requires only a simple and fast cooperation from the user.
  • biodetection image forming device it is not necessary for the biodetection image forming device to be equipped with an autofocus lens, since the user has to place his hand or his finger (s) in a fixed and fixed position.
  • a biosensor may therefore have a simplified design.
  • the reconstructed visual sign which is projected on the back of the hand or finger (s) to indicate the proper position to the user, may include an ideogram, a geometric pattern, at least one letter and / or one representation of at least part of the hand or finger (s). It can be a luminous sign such as a circle or the word "OK" for example.
  • the sign is constituted by at least two separate components, which may be different parts of the sign that overlap, complement or connect on the back of the hand or finger (s) when the finger is in a position that captures the image of biodetection.
  • the visual sign may be an areal set of graphic, alphanumeric, or spectral elements that are disjoint or grouped in different areas of the registration plane, and whose structure or distribution contains information sensitive to a movement of the hand in the direction perpendicular to the image capture plane.
  • This set of graphic elements is separated into at least two subassemblies which make it possible, for example by juxtaposition, to recompose the complete set in a form identifiable by the user, during a movement of his hand.
  • the projection device of the two components of the visual sign comprises two projection systems adapted to respectively project the components to a region of the registration plane in which the visual sign is reconstructed. Respective projection directions of these systems are oblique to the direction perpendicular to the image acquisition plane, and intersect substantially at a point of the registration plane.
  • the two components of the visual sign are then portions of a divided image that appear staggered when the hand or finger is too advanced, or not advanced enough, relative to the biodetection image forming device, and appear aligned , superimposed or in continuous extension of one another when the hand or finger is in the position required to capture the biodetection image.
  • the biosensor may further comprise a system for adjusting the distance between the image acquisition plane and the registration plane, this distance being adjusted according to a dimension of the hand or finger of the user.
  • This dimension of the user's hand or finger can provide an indication of the thickness of that hand or finger.
  • the distance between the image capture plane and the registration plane can then be adjusted to the value of this thickness, so that the positioning accuracy of the user's hand or finger, compared to the input plane image, is improved.
  • the biodetection image may be recorded and analyzed for recognition and / or identification. of the user.
  • the distance between the image acquisition plane and the tracking plane is then adjusted to step / a1 / to the value of the thickness of the hand or finger of the user which is deduced in step / a13 /.
  • the biosensing image forming device then has the additional function of forming a prior image of the hand or finger from which a width thereof can be evaluated.
  • the directions V and A respectively indicate a vertical direction and a direction towards the having of the hand or finger placement area in the biodetectors shown.
  • the directions G and D are oriented respectively to the left and to the right of a user of the biodetectors.
  • the dimensions and positions of the different parts of biodetectors that are shown are only indicative, and do not correspond to dimensions or ratios of real dimensions.
  • the invention is described in detail in the context of a fingerprint detector, but it can be transposed without difficulty to a biosensor which is intended to form an image of part or all of the face internal of the hand, for example when the recognition is based on the palmar imprint, the contour of the hand or the geometry of the fingers.
  • a biosensor comprises a main part 10 and two projection systems of a visual sign, referenced 20 and 30.
  • the part 10 comprises a device 11 for forming and recording a biodetection image.
  • the device 11 is placed below a transparent optical window 12, and itself comprises a lens 13 and a matrix of photodetectors 14.
  • the transparent window 12 may have a protective function of the objective 13.
  • the objective 13 and the matrix 14 are arranged so as to form, on the matrix through the window 12, a image of a finger placed at a distance F in front of the lens.
  • the distance F is the focusing distance of the device 11, or "focus" in English. It is supposed fixed in the following of this description.
  • ⁇ denotes the image axis of the biodetection imaging device 11.
  • the matrix 14 may be selected according to the ratio of the size of the biodetection image to the desired resolution. It can be for example of dimensions 24 x 36 mm 2 and comprise at least 12.5 million pixels.
  • the distance F. is optimized in a manner known per se, to obtain a magnification compatible with an image that covers a sufficient portion of the hand or finger (s). Typically, a resolution of 50 ⁇ m is suitable for fingerprint-based recognition.
  • a user 100 has the inner face of his index 101 in front of the lens 13, substantially at the distance F thereof.
  • the systems 20 and 30 form a reconstituted sign 40 on the outer face, or upper face, of his finger, for example in the area of the nail.
  • the sign may further indicate the location where the finger must be presented within a plane perpendicular to the axis ⁇ , that is to say along the directions A, G and D.
  • the window 12 and the objective 13 are arranged in the portion 10 of the biosensor so that, when the finger 101 is correctly positioned to allow the capture of a biodetection image, the inner surface of the finger is located at a rather short distance from the window 12.
  • this distance can be less than 2 cm, preferably between 5 mm and 1 cm.
  • the proximity of the finger 101 relative to the window 12 is advantageous because it encourages the user to correctly unfold his finger, or his hand, and to present it in parallel at the window.
  • a larger part of the finger or hand is properly placed to allow the recording of a biodetection image that has sufficient quality.
  • the biodetector may further comprise a lighting system (not shown), which is located to illuminate the inner face of the finger 101, so as to to obtain a biodetection image that has sufficient contrast.
  • the lighting system may be located in the portion 10 of the biosensor and illuminates the finger 101 of the user through the window 12 when the biodetection image is captured.
  • it may be located on each side of the portion 10 of the biosensor, and be associated with appropriate light return means for illuminating the lower surface of the finger 101.
  • the illumination direction may be inclined relative to the axis ⁇ , in particular to enhance a contrast of the biodetection image that is captured, for example by shading effect of the cutaneous reliefs of the fingerprint.
  • the volume of placement of the hand above the window 12 can be partitioned, while leaving a field of view free for the user 100 so that he can look at the visual sign 40 projected on his hand or on his finger.
  • the figure 2 represents the elements of the biosensor in a plane containing the axis ⁇ and parallel to the directions G and D.
  • the distance F defines a biosensing image capture plane, noted P0 and perpendicular to the axis ⁇ .
  • the device 11 captures and records a fingerprint image which is clear.
  • the projection systems 20 and 30 each comprise a projector 21, respectively 31, and a mirror 23, respectively 33, which is disposed at the exit of the corresponding system, on each side of the placement volume of the finger or the hand of the
  • the two projectors 21 and 31 produce respective light beams F2 and F3, which are represented by their respective directions.
  • the mirrors 23 and 33 respectively reflect beams F2 and F3 which, after reflection, can each form an angle of between 20 and 70 degrees, for example about 45 degrees, with the axis ⁇ .
  • the beams F2 and F3 converge at a point located at a distance e above the plane P0.
  • the sign 40 may consist of two light lines parallel to the direction A, in accordance with the figure 3a .
  • Each line is a component of the sign 40 which is projected by one of the systems 20 or 30.
  • the line 42 can thus be projected by the system 20 and the line 43 can be projected by the system 30.
  • the mirrors 23 and 33 can be oriented so that the sign 40 is formed at the distance e above the plane P0 by the superposition of the two lines 42 and 43.
  • the beam F2 may be red and the beam F3 may be colored blue.
  • the red line 42 appears to the right of the blue line 43 on the top of the finger 101.
  • the red line 42 appears to the left of the line blue 43 on the top of the finger 101 when the finger is too far from the part 10 (situation shown on the figure 3a ).
  • the two lines 42 and 43 are superimposed and form a single line of purple color. It is thus possible for the user 100 to quickly judge whether he places his finger at the right height above the window 12, and to correct the height thereof if necessary.
  • the plane in which the two lines 42 and 43 appear superimposed on each other on the top of the finger 101 is called the registration plane, and noted P1 on the figure 2 .
  • the distance between the planes P0 and P1 then corresponds to the thickness of the finger 101.
  • the plane P0 is located at a distance of less than 2 cm from the window 12.
  • the Figures 3b and 3c correspond to the figure 3a , for visual signs in the form of a luminous disk or an "OK" symbol.
  • Each component 42, 43 of the sign 40 is a half-disc cut parallel to the direction A in the first case, and is one of the two letters O or K in the second case.
  • the right height of the finger 101 above the window 12 is indicated by the juxtaposition of the two half-disks to form a complete and regular disk, or by the juxtaposition of the two letters to form the indication "OK".
  • the letters O and K are each cut into two right and left parts, respectively 42 and 43, and the correct height of the finger 101 is indicated by connection, or splicing, between the two parts of each letter ( figure 3d ).
  • the two components are respectively a circle 42 and a cross 43 intended to be brought to the center of the circle when the finger is moved to the correct height above the window 12 ( figure 3e ).
  • the visual sign 40 may comprise rectilinear segments 44 which each designate the location of a finger in the registration plane P1, and the direction of extension of the finger in this plane.
  • Each segment 44 may itself be composed of several elementary segments 45 belonging to one or the other of the two components 42 and 43 of the visual sign 40.
  • the elementary segments 45 of the same segment 44 then appear offset when the hand is not at the correct height above the window 12 ( figure 4a ), and aligned to form continuous segments 44 when the user 100 has placed his fingers at the right height above the window 12, and spread them so that each segment 44 is projected on a finger, according to the extension of it ( figure 4b ).
  • Such segments-shaped components 42, 43 more specifically designate the proper location of the fingers parallel to the window 12.
  • the registration plane P1 can be moved by varying the inclinations of the projection directions of the two components of the sign 40.
  • respective inclinations of the two steerable mirrors 23 and 33 are modified, so as to vary symmetrically the inclinations of the beams F2 and F3 in a plane perpendicular to the image capture plane P0. In this way, the position of the reconstituted visual sign 40 can be shifted along the ⁇ axis.
  • Stepper motors may be used to simultaneously orient the mirrors 23 and 33 in a continuous or discrete variation.
  • the registration plane P1 in which the visual sign 40 is reconstituted is moved along the axis ⁇ .
  • P1 ' indicates a position of the registration plane which is shifted upwards with respect to the position indicated by P1.
  • the directions of the projection beams F2 and F3 can be varied using faceted circular prisms.
  • a circular prism has facets which are inclined differently so as to vary, by rotation of the prism, the inclination of an emergent beam produced from a fixed incident beam.
  • Such prisms can be arranged in place of the mirrors 23 and 33.
  • the distance between the registration plane and the image acquisition plane P0 can be adapted according to an evaluated dimension of the finger 101.
  • This dimension can be, for example, a width I of the finger 101 parallel to the directions G and D.
  • a first image of the finger is grasped, for example by means of the device 11, which is then processed by a contour detection method.
  • the width I of the finger 101 is thus evaluated, and a thickness e of the finger is deduced therefrom.
  • the thickness e can be determined using an empirical conversion formula between the width I of the finger and its thickness, or by using a recorded correspondence curve.
  • the finger section has an oval shape, and the thickness e of the finger can be calculated from its width I using a proportionality relation.
  • the first image of the finger which is thus grasped by the device 11 may be fuzzy, but it nevertheless makes it possible to evaluate the width of the finger 101 with sufficient accuracy.
  • the distance e between the planes P0 and P1 can be established according to an average evaluation of the fingers or the hands of a population of users to which the biosensor is intended.
  • the mirrors 23 and 33 are then oriented to bring the registration plane at a distance from the image acquisition plane P0 equal to the thickness of the image.
  • the image capture plane P0 is fixed relative to the portion 10 of the biosensor, and the distance between the plane P0 and the registration plane is adjusted by moving the latter.
  • the references P1 and P1 ' correspond to two positions of the registration plane, respectively for a thin finger of thickness e and a thick finger of thickness e'.
  • a biosensor according to the invention may be adapted to allow detection of the hand, part of the hand, or one or more fingers of a user, depending on the biological parameters on which recognition is based. and / or the identification of the user.

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Image Input (AREA)
  • Push-Button Switches (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Claims (21)

  1. Biodetektor, der es erlaubt, ein Bild einer Hand oder mindestens eines Fingers (101) eines Benutzers (100) aufzuzeichnen, Folgendes aufweisend:
    - eine Vorrichtung zum Bilden eines Biodetektionsbilds (11), die das Bild aufzeichnen kann, wenn eine erste Seite der Hand oder des Fingers im Wesentlichen in einen Abschnitt einer bestimmten Bilderfassungsebene (P0) platziert wird,
    dadurch gekennzeichnet, dass der Abschnitt der Bilderfassungsebene in einem Platzierungsvolumen der Hand oder des Fingers ohne Kontaktfläche liegt, und dass der Biodetektor ferner Folgendes aufweist:
    - eine Vorrichtung (20, 30) zum Projizieren von zwei Komponenten (42, 43) eines visuellen Zeichens (40), die derart gestaltet ist, dass das Zeichen ausgehend von den Bestandteilen in einer Ortungsebene (P1), die im Wesentlichen zu der Bilderfassungsebene parallel ist, wiederhergestellt wird, wobei sich die Orientierungsebene, wenn das Biodetektionsbild gebildet wird, in einer derartigen Entfernung (e) von der Bilderfassungsebene gebildet wird, dass das wiederhergestellte Bild (40) auf einer zweiten Seite der Hand oder des Fingers, die der ersten Seite entgegengesetzt ist, sichtbar ist.
  2. Biodetektor nach Anspruch 1, dadurch gekennzeichnet, dass die Bilderfassungsebene (P0) in einer Entfernung von weniger als 2 cm von einem durchsichtigen Fenster liegt, das vor der Biodetektions-Bilderzeugungsvorrichtung (11) liegt.
  3. Biodetektor nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass er ferner ein System zum Anpassen der Entfernung (e) zwischen der Bilderfassungsebene (P0) und der Ortungsebene (P1) aufweist, wobei die Entfernung in Abhängigkeit von einem Maß der Hand oder des Fingers (101) des Benutzers angepasst wird.
  4. Biodetektor nach Anspruch 3, bei dem das Maß der Hand oder des Fingers des Benutzers (101) eine Breite (I) der Hand oder des Fingers entlang einer Richtung parallel zu der Bilderfassungsebene (P0) aufweist.
  5. Biodetektor nach Anspruch 4, der derart angepasst ist, dass die Breite (I) der Hand oder des Fingers ausgehend von einem zuvor von der Biodetektions-Bilderzeugungsvorrichtung (11) gebildeten Bild beurteilt wird.
  6. Biodetektor nach einem der Ansprüche 3 bis 5, bei dem die Bilderfassungsebene (P0) stationär ist, und die Entfernung (e) zwischen der Bilderfassungsebene und der Ortungsebene (P1) durch Bewegen der Ortungsebene angepasst wird.
  7. Biodetektor nach einem der vorhergehenden Ansprüche, bei dem die Projektionsvorrichtung der zwei Bestandteile des visuellen Zeichens (40) zwei Projektionssysteme (20, 30) aufweist, die jeweils die Bestandteile (42, 43) zu einer Zone der Ortungsebene (P1), in der das visuelle Zeichen wieder hergestellt wird, projizieren können, wobei die jeweiligen Projektionsrichtungen der Systeme zu einer Richtung (Δ) senkrecht zu der Bilderfassungsebene (P0) schräg sind und sich in einem Punkt der Ortungsebene schneiden.
  8. Biodetektor nach den Ansprüchen 6 und 7, der derart angepasst ist, dass die Ortungsebene (P1) unter symmetrischem Variieren der jeweiligen Neigungen der Projektionsrichtungen der zwei Bestandteile des visuellen Zeichens (42, 43) in einer Ebene senkrecht zu der Bilderfassungsebene (P0) bewegt werden kann.
  9. Biodetektor nach Anspruch 8, der zwei ausrichtbare Spiegel (23, 33) aufweist, die angeordnet werden können, um die jeweiligen Neigungen der Projektionsrichtungen der zwei Bestandteile des visuellen Zeichens (42, 43) zu ändern.
  10. Biodetektor nach Anspruch 8, der zwei kreisförmige Prismen mit Facetten aufweist, die angeordnet sind, um die jeweiligen Neigungen der Projektionsrichtungen der zwei Bestandteile des visuellen Zeichens (42, 43) zu ändern.
  11. Biodetektor nach einem der vorhergehenden Ansprüche, bei dem das Wiederherstellen des visuellen Zeichens (40) ein Überlagern der zwei Bestandteile (42, 43), eine Komplementarität oder einen Anschluss der zwei Bestandteile aneinander aufweist.
  12. Biodetektor nach einem der vorhergehenden Ansprüche, bei dem das wiederhergestellte visuelle Zeichen (40) ein Ideogramm, ein geometrisches Muster, mindestens einen Buchstaben und/oder eine Darstellung zumindest eines Teils der Hand oder des Fingers (101) aufweist.
  13. Biodetektor nach einem der vorhergehenden Ansprüche, bei dem die Bilderfassungsebene (P0) und die Ortungsebene (P1) untereinander einen Raum (W) mit einer variablen Stärke bilden, die einem Stärkenprofil der Hand des Benutzers (100) entspricht.
  14. Biodetektor nach einem der vorhergehenden Ansprüche, bei dem das visuelle Zeichen (40) ein visuelles Hauptzeichen aufweist, das dazu bestimmt ist, auf den Rücken der Hand des Benutzers projiziert zu werden, und visuelle Hilfszeichen, die dazu bestimmt sind, auf mehrere Finger der Hand projiziert zu werden.
  15. Biodetektor nach einem der vorhergehenden Ansprüche, der ferner ein Bildverarbeitungssystem aufweist, das eine aufgezeichnete Qualität des aufgezeichneten Biodetektionsbilds verbessern kann.
  16. Biodetektor nach einem der vorhergehenden Ansprüche, der ferner ein Entfernungsmessungssystem aufweist, das eine Entfernung zwischen der Hand oder dem Finger des Benutzers (101) und der Biodetektions-Bilderzeugungsvorrichtung (11) bestimmen kann, und eine Bewegung der Ortungsebene (P1) entlang einer Richtung senkrecht zu der Bilderfassungsebene (Δ) steuern kann.
  17. Biodetektor nach einem der vorhergehenden Ansprüche, bei dem die Biodetektions-Bilderzeugungsvorrichtung (11) ein System zum automatischen Fokussieren aufweist, wobei der Biodetektor ferner ein Entfernungsmessungssystem aufweist, das eine Entfernung zwischen der Hand oder dem Finger (101) des Benutzers und der Biodetektions-Bilderzeugungsvorrichtung (11) bestimmen und eine Einstellung des automatischen Fokussierungssystems steuern kann.
  18. Biodetektionsverfahren, das unter Einsatz eines Biodetektors nach einem der vorhergehenden Ansprüche umgesetzt wird.
  19. Verfahren nach Anspruch 18, das die folgenden Schritte aufweist:
    a) seitens des Benutzers (100) Platzieren einer Hand oder eines Fingers (101) in einem Feld der Biodetektions-Bilderzeugungsvorrichtung (11);
    b) Projizieren auf die Hand oder den Finger des Benutzers auf einer Seite, die der Biodetektions-Bilderzeugungsvorrichtung (11) entgegengesetzt ist, der zwei Bestandteile des visuellen Zeichens (42, 43); und
    c) seitens des Benutzers Ändern einer Höhe (F) der Hand oder des Fingers vor der Biodetektions-Bilderzeugungsvorrichtung, bis das sichtbare Zeichen (40) auf einer Seite der Hand oder des Fingers, die der Biodetektions-Bilderzeugungsvorrichtung entgegengesetzt ist, wiederhergestellt erscheint.
  20. Verfahren nach Anspruch 19, das ferner den folgenden Schritt aufweist, der zwischen den Schritten a) und b) ausgeführt wird:
    a1) Anpassen einer Entfernung (e) zwischen der Bilderfassungsebene (P0) und der Ortungsebene (P1) in Abhängigkeit von einem Maß der Hand oder des Fingers (101) des Benutzers.
  21. Verfahren nach Anspruch 20, bei dem das Maß eine Breite (I) der Hand oder des Fingers (101) entlang einer Richtung parallel zur Bilderfassungsebene (P0) aufweist, wobei das Verfahren ferner die folgenden Schritte aufweist, die zwischen den Schritten a) und a1) ausgeführt werden:
    a11) Bilden eines Vorabbilds der Hand oder des Fingers des Benutzers mittels der Biodetektions-Bilderzeugungsvorrichtung (11);
    a12) gemäß dem Vorabbild Beurteilen der Breite (I) der Hand oder des Fingers; und
    a13) Ableiten ausgehend von der Breite eines Stärkenwerts der Hand oder des Fingers des Benutzers,
    wobei die Entfernung (e) zwischen der Bilderfassungsebene (P0) und der Ortungsebene (P1) im Schritt a1) an den Stärkenwert der Hand oder des Fingers des Benutzers, der im Schritt a13) abgeleitet wird, angepasst wird.
EP07731018A 2006-02-24 2007-02-21 Biodetektor mit kontaktlosem betrieb Active EP1987472B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0601656A FR2897966B1 (fr) 2006-02-24 2006-02-24 Biodetecteur sans contact
PCT/FR2007/000311 WO2007096520A1 (fr) 2006-02-24 2007-02-21 Biodetecteur sans contact

Publications (2)

Publication Number Publication Date
EP1987472A1 EP1987472A1 (de) 2008-11-05
EP1987472B1 true EP1987472B1 (de) 2009-06-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07731018A Active EP1987472B1 (de) 2006-02-24 2007-02-21 Biodetektor mit kontaktlosem betrieb

Country Status (9)

Country Link
US (1) US8340371B2 (de)
EP (1) EP1987472B1 (de)
JP (1) JP5279512B2 (de)
AT (1) ATE434801T1 (de)
AU (1) AU2007217328B2 (de)
CA (1) CA2643371A1 (de)
DE (1) DE602007001387D1 (de)
FR (1) FR2897966B1 (de)
WO (1) WO2007096520A1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5186929B2 (ja) * 2008-01-21 2013-04-24 日本電気株式会社 認証用撮像装置
EP2622539A1 (de) * 2010-09-28 2013-08-07 Icognize GmbH Verfahren und vorrichtung zur berührungslosen erfassung biometrischer merkmale
US8781177B2 (en) * 2011-07-08 2014-07-15 I Shou University Method and computer program product for extracting feature vectors from a palm image
US9349033B2 (en) 2011-09-21 2016-05-24 The United States of America, as represented by the Secretary of Commerce, The National Institute of Standards and Technology Standard calibration target for contactless fingerprint scanners
GB2525516B (en) * 2012-11-14 2020-04-22 Weiss Golan Biometric methods and systems for enrollment and authentication
DE102020200569A1 (de) 2020-01-17 2021-07-22 Brno University of Technology Einrichtung zur biometrischen Identifikation mit Hilfe von Fingerabdrücken und/oder Handcharakteristiken und Verfahren zur biometrischen Identifikation mit Hilfe dieser Charakteristiken
FR3113152B1 (fr) * 2020-07-30 2023-10-06 Idemia Identity & Security France Terminal biométrique, en particulier de contrôle d’accès
DE102022115810A1 (de) 2022-06-24 2024-01-04 IDloop GmbH Vorrichtung zur kontaktlosen aufnahme von biometriedaten von hautbereichen

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DE19818229A1 (de) * 1998-04-24 1999-10-28 Hauke Rudolf System zur berührungslosen Hand- und Fingerlinien-Erkennung
WO2000019383A2 (en) * 1998-09-11 2000-04-06 Loquitor Technologies Llc Generation and detection of induced current using acoustic energy
DE10046406A1 (de) * 1999-09-17 2001-06-07 Fingerpin Ag Zuerich Vorrichtung zur Fingererkennung
JP2001167255A (ja) * 1999-12-13 2001-06-22 Masahiko Okuno 非接触型指紋識別装置および方法
JP2002092616A (ja) * 2000-09-20 2002-03-29 Hitachi Ltd 個人認証装置
US7031502B1 (en) * 2001-01-29 2006-04-18 University Of Massachusetts Lowell Adjustable guide for viewing biometric surface patterns
US7095901B2 (en) * 2001-03-15 2006-08-22 Lg Electronics, Inc. Apparatus and method for adjusting focus position in iris recognition system
FR2829344B1 (fr) 2001-08-29 2004-10-01 Oreal Dispositif d'acquisition d'au moins une image d'au moins une partie du visage ou de la chevelure d'une personne
KR100842501B1 (ko) * 2002-02-21 2008-07-01 엘지전자 주식회사 홍채 인식 시스템의 눈위치 표시장치
FR2849244B1 (fr) 2002-12-20 2006-03-10 Sagem Procede de determination du caractere vivant d'un element porteur d'une empreinte digitale
FR2849246B1 (fr) 2002-12-20 2006-03-10 Sagem Procede de determination du caractere vivant d'un element porteur d'une empreinte digitale
JP4207717B2 (ja) * 2003-08-26 2009-01-14 株式会社日立製作所 個人認証装置
FR2861200B1 (fr) 2003-10-17 2006-01-20 Sagem Dispositif optique de formation d'une image d'empreintes digitales
FR2862408B1 (fr) 2003-11-14 2006-03-24 Sagem Dispositif optique d'imagerie propre a la formation d'une image d'empreintes digitales
JP4547899B2 (ja) * 2003-11-25 2010-09-22 株式会社日立製作所 個人認証装置
FR2872318B1 (fr) 2004-06-23 2006-09-22 Sagem Dispositif optique de capture biometrique par contact et installation mettant en oeuvre un tel dispositif
EP1612714B1 (de) * 2004-06-28 2009-06-24 Fujitsu Limited Biometrische Authentisierung mit Übertragung von verschlüsselten Daten

Also Published As

Publication number Publication date
US20090046331A1 (en) 2009-02-19
ATE434801T1 (de) 2009-07-15
CA2643371A1 (fr) 2007-08-30
JP2009527307A (ja) 2009-07-30
EP1987472A1 (de) 2008-11-05
AU2007217328B2 (en) 2012-04-19
JP5279512B2 (ja) 2013-09-04
US8340371B2 (en) 2012-12-25
AU2007217328A1 (en) 2007-08-30
FR2897966A1 (fr) 2007-08-31
FR2897966B1 (fr) 2008-05-16
WO2007096520A1 (fr) 2007-08-30
DE602007001387D1 (de) 2009-08-06

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